The Army and the Environmental Protection Agency are decreasing the contamination at the Army's Aberdeen Proving
Grounds by ____.
a. removing contaminated soil
b. planting hybrid poplar trees
c. chemically degrading the contaminants
d. covering the contaminated soil with a sealant
e. injecting the soil with clean water to dilute the contaminated groundwater
ANSWER: b
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Boiling is not reliable for sterilization because
A. heat-sensitive instruments may be destroyed. B. heat-resistant endospores are unaffected. C. water boils at a higher temperature at lower altitudes. D. viruses are more sensitive to heat than bacteria.
Which one of the following is an example of a seed dispersed by water?
a. sunflower b. acorn c. coconut d. peach e. jack fruit
The discovery of the first Homo erectus was based on the evaluation of two specimens. One was a skullcap and the other was a:
A. Mandible B. Pelvis C. Femur D. Foot E. Rib
Which of the following is the main difference between the urinary system of males and females?
a. Men have two urethras, while women have only one urethra. b. The urethra is shorter in females. c. Men have longer ureters than females. d. Kidneys tend to be larger in females. e. The female urethra passes through the prostate gland.